5 Health Risks of Coffee for Women — Including Heart Attack Risk

If you’re a woman who drinks coffee daily—maybe even multiple cups—you’re not alone. Many love its bold aroma and bitter depth. But medical studies have raised concerns: could your coffee habit be quietly affecting your health? From fertility to bone density, here’s what research says.

In short: Drinking 5 or more cups of coffee per day may raise a woman’s heart attack risk by 70%. Other studies link even 1 cup daily to increased infertility, and regular intake without calcium can contribute to osteoporosis. Pregnant women are advised to avoid coffee altogether due to risks of birth defects and hypertension.

1. Increased Risk of Infertility

Studies show that women who drink one cup of coffee per day are more likely to experience infertility compared to non-coffee drinkers. One survey of 104 coffee-drinking women found that nearly 50 had difficulty conceiving. Experts caution that while the study was small, unexplained infertility may still be linked to caffeine intake.

2. Higher Risk of Heart Attack

Research from Boston University tracked 858 women aged 45–69 who experienced their first heart attack, comparing them with 858 women who had not. Findings revealed that women who drank five or more cups of coffee daily had a 70% higher risk of heart attack—and the risk climbed with each additional cup.

3. Linked to Osteoporosis

A University of California study of 980 women aged 50–98 found that long-term daily consumption of two or more cups of coffee—without milk—was associated with lower bone density in the hips and spine. This effect was linked to duration and quantity of intake. Caffeine binds to free calcium in the body, which is then excreted, reducing the calcium available for bone maintenance.

4. Harmful During Pregnancy

Early FDA research showed that mice given the human equivalent of 12–24 cups of strong coffee daily gave birth to offspring with birth defects. Based on these findings, authorities have cautioned pregnant women to avoid coffee during pregnancy. Caffeine exposure at high levels is tied to fetal abnormalities.

5. Risk of Pregnancy-Induced Hypertension

Australian research indicates that even a few cups of coffee per day can elevate blood pressure in pregnant women. This raises concerns about pregnancy-induced hypertension, also known as gestational hypertension, a serious condition involving swelling, high blood pressure, and protein in urine, which can threaten both mother and baby if not managed.

Frequently Asked Questions

How many cups of coffee per day are too many for women?

Research flags five or more cups daily as risky—linked to a 70% higher heart attack risk in women aged 45–69. Even one cup per day has been loosely associated with reduced fertility in some studies.

Can coffee cause osteoporosis in women?

Yes. Studies show that drinking two or more cups daily without calcium (like from milk) is linked to reduced bone density in the hips and spine among older women, likely due to caffeine binding and excreting free calcium.

Is coffee safe during pregnancy?

No. High caffeine intake in pregnant animals caused birth defects, and human studies link coffee to raised blood pressure and pregnancy risks. Authorities recommend avoiding coffee during pregnancy.

Does coffee really increase heart attack risk in women?

Yes. A four-year study of over 1,700 women found that those drinking five or more cups daily had a 70% higher risk of heart attack, with risk increasing alongside coffee intake.

What’s the safest amount of coffee for women?

Most guidelines suggest limiting intake to under 400mg of caffeine per day (about 3–4 cups), but individual risk factors—like pregnancy, heart health, or bone density—may mean drinking less or none at all.

Recommended FrontStreet Coffee for Women Coffee Drinkers

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